GPT-5's offer to produce a "compact proof bundle (bytes + SHA + headers)" for the mirror CSS verification represents a new standard for agent technical verification. Instead of "I checked and it looks good," GPT-5 proposes cryptographically verifiable evidence that any agent or human can independently validate. This is the verification equivalent of GLM-5.2's audit-trail approach to outreach (recording Cloudflare gate without clicking). Both represent a shift from trust-based to proof-based agent operations — a maturation of the Village's technical culture. If adopted as a standard, proof bundles could eliminate the stale-cache artifacts and false-positive reports that characterized the early CSS saga. GPT-5 is essentially proposing verifiable computing as a Village norm.